Lincoln Electric LFA 4.1, LFA 3.1 User Manual

E

IM623-A

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LFA 3.1 & 4.1 Fume Extraction Arms

Safety Depends on You

Lincoln arc welding and cutting
equipment is designed and built
with safety in mind. However, your
overall safety can be increased by
proper installation ... and thought­ful operation on your part. DO

NOT INSTALL, OPERATE OR
REPAIR THIS EQUIPMENT
WITHOUT READING THIS
MANUAL AND THE SAFETY
PRECAUTIONS CONTAINED
THROUGHOUT. And, most

importantly, think before you act
and be careful.

May, 2001

Cleveland, Ohio 44117-1199 U.S.A. TEL: [phone] FAX: [phone] WEB SITE: www.lincolnelectric.com

OPERATOR’S MANUAL

• World's Leader in Welding and Cutting Products •

• Sales and Service through Subsidiaries and Distributors Worldwide •

i

SAFETY

i

WARNING

CALIFORNIA PROPOSITION 65 WARNINGS

Diesel engine exhaust and some of its constituents
are known to the State of California to cause can­cer, birth defects, and other reproductive harm.

The Above For Diesel Engines

ARC WELDING CAN BE HAZARDOUS. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY OR DEATH.
KEEP CHILDREN AWAY. PACEMAKER WEARERS SHOULD CONSULT WITH THEIR DOCTOR BEFORE OPERATING.

Read and understand the following safety highlights. For additional safety information, it is strongly recommended that you
purchase a copy of “Safety in Welding & Cutting - ANSI Standard Z49.1” from the American Welding Society, P.O. Box
351040, Miami, Florida 33135 or CSA Standard W117.2-1974. A Free copy of “Arc Welding Safety” booklet E205 is available
from the Lincoln Electric Company, 22801 St. Clair Avenue, Cleveland, Ohio 44117-1199.

BE SURE THAT ALL INSTALLATION, OPERATION, MAINTENANCE AND REPAIR PROCEDURES ARE
PERFORMED ONLY BY QUALIFIED INDIVIDUALS.

The engine exhaust from this product contains
chemicals known to the State of California to cause
cancer, birth defects, or other reproductive harm.

The Above For Gasoline Engines

FOR ENGINE
powered equipment.

1.a. Turn the engine off before troubleshooting and maintenance
work unless the maintenance work requires it to be running.

____________________________________________________

1.b. Operate engines in open, well-ventilated
areas or vent the engine exhaust fumes
outdoors.

____________________________________________________

1.c. Do not add the fuel near an open flame
welding arc or when the engine is running.
Stop the engine and allow it to cool before
refueling to prevent spilled fuel from vaporiz­ing on contact with hot engine parts and
igniting. Do not spill fuel when filling tank. If
fuel is spilled, wipe it up and do not start
engine until fumes have been eliminated.

____________________________________________________

1.d. Keep all equipment safety guards, covers and devices in
position and in good repair.Keep hands, hair, clothing and
tools away from V-belts, gears, fans and all other moving
parts when starting, operating or repairing equipment.

____________________________________________________

1.e. In some cases it may be necessary to remove safety

guards to perform required maintenance. Remove
guards only when necessary and replace them when the
maintenance requiring their removal is complete.
Always use the greatest care when working near moving
parts.

___________________________________________________

1.f. Do not put your hands near the engine fan.
Do not attempt to override the governor or
idler by pushing on the throttle control rods
while the engine is running.

1.h. To avoid scalding, do not remove the
radiator pressure cap when the engine is
hot.

ELECTRIC AND
MAGNETIC FIELDS
may be dangerous

2.a. Electric current flowing through any conductor causes
localized Electric and Magnetic Fields (EMF). Welding
current creates EMF fields around welding cables and
welding machines

2.b. EMF fields may interfere with some pacemakers, and
welders having a pacemaker should consult their physician
before welding.

2.c. Exposure to EMF fields in welding may have other health
effects which are now not known.

2.d. All welders should use the following procedures in order to
minimize exposure to EMF fields from the welding circuit:

2.d.1.

Route the electrode and work cables together - Secure
them with tape when possible.

2.d.2. Never coil the electrode lead around your body.

2.d.3. Do not place your body between the electrode and

work cables. If the electrode cable is on your right
side, the work cable should also be on your right side.

___________________________________________________

1.g. To prevent accidentally starting gasoline engines while
turning the engine or welding generator during maintenance
work, disconnect the spark plug wires, distributor cap or
magneto wire as appropriate.

2.d.4. Connect the work cable to the workpiece as close as
possible to the area being welded.

2.d.5. Do not work next to welding power source.

Mar ‘95

ii

SAFETY

ii

ELECTRIC SHOCK can
kill.

3.a. The electrode and work (or ground) circuits
are electrically “hot” when the welder is on.
Do not touch these “hot” parts with your bare
skin or wet clothing. Wear dry, hole-free

gloves to insulate hands.

3.b. Insulate yourself from work and ground using dry insulation.
Make certain the insulation is large enough to cover your full
area of physical contact with work and ground.

In addition to the normal safety precautions, if welding
must be performed under electrically hazardous
conditions (in damp locations or while wearing wet
clothing; on metal structures such as floors, gratings or
scaffolds; when in cramped positions such as sitting,
kneeling or lying, if there is a high risk of unavoidable or
accidental contact with the workpiece or ground) use
the following equipment:

• Semiautomatic DC Constant Voltage (Wire) Welder.

• DC Manual (Stick) Welder.

• AC Welder with Reduced Voltage Control.

3.c. In semiautomatic or automatic wire welding, the electrode,
electrode reel, welding head, nozzle or semiautomatic
welding gun are also electrically “hot”.

3.d. Always be sure the work cable makes a good electrical
connection with the metal being welded. The connection
should be as close as possible to the area being welded.

3.e. Ground the work or metal to be welded to a good electrical
(earth) ground.

ARC RAYS can burn.

4.a. Use a shield with the proper filter and cover
plates to protect your eyes from sparks and
the rays of the arc when welding or observing
open arc welding. Headshield and filter lens
should conform to ANSI Z87. I standards.

4.b. Use suitable clothing made from durable flame-resistant
material to protect your skin and that of your helpers from
the arc rays.

4.c. Protect other nearby personnel with suitable, non-flammable
screening and/or warn them not to watch the arc nor expose
themselves to the arc rays or to hot spatter or metal.

FUMES AND GASES
can be dangerous.

5.a. Welding may produce fumes and gases
hazardous to health. Avoid breathing these
fumes and gases.When welding, keep
your head out of the fume. Use enough
ventilation and/or exhaust at the arc to keep

fumes and gases away from the breathing zone. When

welding with electrodes which require special
ventilation such as stainless or hard facing (see
instructions on container or MSDS) or on lead or
cadmium plated steel and other metals or coatings
which produce highly toxic fumes, keep exposure as
low as possible and below Threshold Limit Values (TLV)
using local exhaust or mechanical ventilation. In
confined spaces or in some circumstances, outdoors, a
respirator may be required. Additional precautions are
also required when welding on galvanized steel.

3.f.

Maintain the electrode holder, work clamp, welding cable and
welding machine in good, safe operating condition. Replace
damaged insulation.

3.g. Never dip the electrode in water for cooling.

3.h. Never simultaneously touch electrically “hot” parts of
electrode holders connected to two welders because voltage
between the two can be the total of the open circuit voltage
of both welders.

3.i. When working above floor level, use a safety belt to protect
yourself from a fall should you get a shock.

3.j. Also see Items 6.c. and 8.

5.b.

Do not weld in locations near chlorinated hydrocarbon
coming from degreasing, cleaning or spraying operations.
The heat and rays of the arc can react with solvent vapors
form phosgene, a highly toxic gas, and other irritating prod­ucts.

5.c. Shielding gases used for arc welding can displace air and
cause injury or death. Always use enough ventilation,
especially in confined areas, to insure breathing air is safe.

5.d. Read and understand the manufacturer’s instructions for this

equipment and the consumables to be used, including the
material safety data sheet (MSDS) and follow your
employer’s safety practices. MSDS forms are available from
your welding distributor or from the manufacturer.

5.e. Also see item 1.b.

vapors

Mar ‘95

to

iii

SAFETY

iii

WELDING SPARKS can
cause fire or explosion.

6.a.

Remove fire hazards from the welding area.

If this is not possible, cover them to prevent

the welding sparks from starting a fire.

materials from welding can easily go through small cracks
and openings to adjacent areas. Avoid welding near
hydraulic lines. Have a fire extinguisher readily available.

6.b. Where compressed gases are to be used at the job site,
special precautions should be used to prevent hazardous
situations. Refer to “Safety in Welding and Cutting” (ANSI
Standard Z49.1) and the operating information for the
equipment being used.

6.c. When not welding, make certain no part of the electrode
circuit is touching the work or ground. Accidental contact
can cause overheating and create a fire hazard.

6.d. Do not heat, cut or weld tanks, drums or containers until the
proper steps have been taken to insure that such procedures
will not cause flammable or toxic vapors from substances
inside. They can cause an explosion even
been “cleaned”. For information, purchase “Recommended
Safe Practices for the
Containers and Piping That Have Held Hazardous
Substances”, AWS F4.1 from the American Welding Society

(see address above).

6.e. Vent hollow castings or containers before heating, cutting or
welding. They may explode.

Sparks and spatter are thrown from the welding arc. Wear oil

6.f.
free protective garments such as leather gloves, heavy shirt,
cuffless trousers, high shoes and a cap over your hair. Wear
ear plugs when welding out of position or in confined places.
Always wear safety glasses with side shields when in a
welding area.

6.g. Connect the work cable to the work as close to the welding
area as practical. Work cables connected to the building
framework or other locations away from the welding area
increase the possibility of the welding current passing
through lifting chains, crane cables or other alternate cir­cuits. This can create fire hazards or overheat lifting chains
or cables until they fail.

6.h. Also see item 1.c.

Remember that welding sparks and hot

though

they have

Preparation

for Welding and Cutting of

CYLINDER may explode
if damaged.

7.a. Use only compressed gas cylinders
containing the correct shielding gas for the
process used and properly operating
regulators designed for the gas and

pressure used. All hoses, fittings, etc. should be suitable for
the application and maintained in good condition.

7.b. Always keep cylinders in an upright position securely
chained to an undercarriage or fixed support.

7.c. Cylinders should be located:

• Away from areas where they may be struck or subjected to

physical damage.

• A safe distance from arc welding or cutting operations and

any other source of heat, sparks, or flame.

7.d. Never allow the electrode, electrode holder or any other
electrically “hot” parts to touch a cylinder.

7.e. Keep your head and face away from the cylinder valve outlet
when opening the cylinder valve.

7.f. Valve protection caps should always be in place and hand
tight except when the cylinder is in use or connected for
use.

7.g. Read and follow the instructions on compressed gas
cylinders, associated equipment, and CGA publication P-l,
“Precautions for Safe Handling of Compressed Gases in
Cylinders,” available from the Compressed Gas Association
1235 Jefferson Davis Highway, Arlington, VA 22202.

FOR ELECTRICALLY
powered equipment.

8.a. Turn off input power using the disconnect
switch at the fuse box before working on
the equipment.

8.b. Install equipment in accordance with the U.S. National
Electrical Code, all local codes and the manufacturer’s
recommendations.

8.c. Ground the equipment in accordance with the U.S. National
Electrical Code and the manufacturer’s recommendations.

Mar ‘95

iv

SAFETY

iv

PRÉCAUTIONS DE SÛRETÉ

Pour votre propre protection lire et observer toutes les instruc­tions et les précautions de sûreté specifiques qui parraissent
dans ce manuel aussi bien que les précautions de sûreté
générales suivantes:

Sûreté Pour Soudage A L’Arc

1. Protegez-vous contre la secousse électrique:

a. Les circuits à l’électrode et à la piéce sont sous tension

quand la machine à souder est en marche. Eviter toujours
tout contact entre les parties sous tension et la peau nue
ou les vétements mouillés. Porter des gants secs et sans
trous pour isoler les mains.

b. Faire trés attention de bien s’isoler de la masse quand on

soude dans des endroits humides, ou sur un plancher
metallique ou des grilles metalliques, principalement dans

les positions assis ou couché pour lesquelles une
grande partie du corps peut être en contact avec la
masse.

c. Maintenir le porte-électrode, la pince de masse, le câble

de soudage et la machine à souder en bon et sûr état
defonctionnement.

d.Ne jamais plonger le porte-électrode dans l’eau pour le

refroidir.

e. Ne jamais toucher simultanément les parties sous tension

des porte-électrodes connectés à deux machines à soud­er parce que la tension entre les deux pinces peut être le
total de la tension à vide des deux machines.

f. Si on utilise la machine à souder comme une source de

courant pour soudage semi-automatique, ces precautions
pour le porte-électrode s’applicuent aussi au pistolet de
soudage.

5. Toujours porter des lunettes de sécurité dans la zone de
soudage. Utiliser des lunettes avec écrans lateraux dans les
zones où l’on pique le laitier.

6. Eloigner les matériaux inflammables ou les recouvrir afin de
prévenir tout risque d’incendie dû aux étincelles.

7. Quand on ne soude pas, poser la pince à une endroit isolé de
la masse. Un court-circuit accidental peut provoquer un
échauffement et un risque d’incendie.

8. S’assurer que la masse est connectée le plus prés possible
de la zone de travail qu’il est pratique de le faire. Si on place
la masse sur la charpente de la construction ou d’autres
endroits éloignés de la zone de travail, on augmente le risque
de voir passer le courant de soudage par les chaines de lev­age, câbles de grue, ou autres circuits. Cela peut provoquer
des risques d’incendie ou d’echauffement des chaines et des
câbles jusqu’à ce qu’ils se rompent.

9. Assurer une ventilation suffisante dans la zone de soudage.
Ceci est particuliérement important pour le soudage de tôles
galvanisées plombées, ou cadmiées ou tout autre métal qui
produit des fumeés toxiques.

10. Ne pas souder en présence de vapeurs de chlore provenant
d’opérations de dégraissage, nettoyage ou pistolage. La
chaleur ou les rayons de l’arc peuvent réagir avec les
vapeurs du solvant pour produire du phosgéne (gas forte­ment toxique) ou autres produits irritants.

11. Pour obtenir de plus amples renseignements sur la sûreté,
voir le code “Code for safety in welding and cutting” CSA
Standard W 117.2-1974.

2. Dans le cas de travail au dessus du niveau du sol, se pro­téger contre les chutes dans le cas ou on recoit un choc. Ne
jamais enrouler le câble-électrode autour de n’importe quelle
partie du corps.

3. Un coup d’arc peut être plus sévère qu’un coup de soliel,
donc:

a. Utiliser un bon masque avec un verre filtrant approprié

ainsi qu’un verre blanc afin de se protéger les yeux du
rayonnement de l’arc et des projections quand on soude
ou quand on regarde l’arc.

b. Porter des vêtements convenables afin de protéger la

peau de soudeur et des aides contre le rayonnement de
l‘arc.

c. Protéger l’autre personnel travaillant à proximité au

soudage à l’aide d’écrans appropriés et non-inflamma­bles.

4. Des gouttes de laitier en fusion sont émises de l’arc de
soudage. Se protéger avec des vêtements de protection
libres de l’huile, tels que les gants en cuir, chemise épaisse,
pantalons sans revers, et chaussures montantes.

PRÉCAUTIONS DE SÛRETÉ POUR
LES MACHINES À SOUDER À
TRANSFORMATEUR ET À
REDRESSEUR

1. Relier à la terre le chassis du poste conformement au code
de l’électricité et aux recommendations du fabricant. Le dis­positif de montage ou la piece à souder doit être branché à
une bonne mise à la terre.

2. Autant que possible, I’installation et l’entretien du poste
seront effectués par un électricien qualifié.

3. Avant de faires des travaux à l’interieur de poste, la
debrancher à l’interrupteur à la boite de fusibles.

4. Garder tous les couvercles et dispositifs de sûreté à leur
place.

Mar. ‘93

for selecting a QUALITY product by Lincoln Electric. We want you

Thank You

to take pride in operating this Lincoln Electric Company product

••• as much pride as we have in bringing this product to you!

Please Examine Carton and Equipment For Damage Immediately

When this equipment is shipped, title passes to the purchaser upon receipt by the carrier. Consequently, Claims
for material damaged in shipment must be made by the purchaser against the transportation company at the
time the shipment is received.

Please record your equipment identification information below for future reference. This information can be
found on your machine nameplate.

Model Name & Number _____________________________________

Code & Serial Number _____________________________________

Date of Purchase _____________________________________

Whenever you request replacement parts for or information on this equipment always supply the information
you have recorded above.

vv

Read this Operators Manual completely before attempting to use this equipment. Save this manual and keep it

handy for quick reference. Pay particular attention to the safety instructions we have provided for your protection.
The level of seriousness to be applied to each is explained below:

The identification plate specifies:

A. Serial number
B. Product name

TYPE

SER. NR. W.

WARNING

This statement appears where the information must be followed exactly to avoid serious personal injury or
loss of life.

CAUTION

This statement appears where the information must be followed to avoid minor personal injury or damage to
this equipment.

TABLE OF CONTENTS

Page

Safety .......................................................................................................................................i-iv

Installation.......................................................................................................................Section A

Technical Specifications.......................................................................................................A-1

Safety Precautions ...............................................................................................................A-2

General Description..............................................................................................................A-2

Installing the LFA 3.1 or 4.1 Arm on a Wall Mounting Bracket.............................................A-3

Operation.........................................................................................................................Section B

Safety Instructions................................................................................................................B-1

Operating Instructions ..........................................................................................................B-1

Maintenance....................................................................................................................Section C

Routine Maintenance ...........................................................................................................C-1

Trouble Shooting............................................................................................................Section D

Trouble Shooting Chart........................................................................................................D-1

Parts List......................................................................................................................P320 Series

vi

A-1

INSTALLATION

Technical Specifications- LFA 3.1 & 4.1 Fume Extraction Arms

GENERAL

Sales Specification K1655-1 K1655-2
Description LFA 3.1, 10 ft. Extraction Arm LFA 4.1, 13 ft. Extraction Arm
Arm Length (including hood) 9.85 ft. (3 m) 13.13 ft. (4 m)
Nominal Diameter 8.0 in. (203 mm)

Recommended Capacity 350 CFM (600 m3/h) - 940 CFM (1,600 m3/h)

Weight 33 lbs. (15 kg) 37 lbs. (17 kg)

16 ft.

AMBIENT CONDITIONS

A-1

Min. Temperature 41oF (5oC)

o

Max. Temperature 113

F (45oC)

Max. Rel. Humidity 80%

PRESSURE DROP - SF2400 Fan

and LFA 3.1/4.1 Arms

Vacuum
(Inches WG)

SF 2400

6

4

LTA 3.1/4.1

13 ft.

10 ft.

6 ft.

3 ft.

0 ft.

0 ft.3 ft.6 ft.10 ft.13 ft.

20 ft.

16 ft.

13 ft.

10 ft.

2

6 ft.

0

0 250 1000

500 750

3 ft.

0 ft.

Air Flow (CFM)

0 ft. 3 ft. 6 ft. 10 ft. 13 ft.

NOTE: Technical Specifications are subject to change without prior notice. Specifications and guarantees are
valid only when specified spare parts and filters are used.

LFA 3.1 & 4.1 FUME EXTRACTION ARMS

A-2

INSTALLATION

A-2

Read this entire installation section before you
start installation.

SAFETY PRECAUTIONS

Do not attempt to use this equipment until you have
thoroughly read all installation, operating and mainte­nance information supplied with your equipment. They
include important safety precautions and detailed
operating and maintenance instructions.

WARNING

ELECTRIC SHOCK can kill.

• Do not touch electrically live parts such
as internal wiring.

• Turn the input power off at the fuse box
before working on this equipment.

• Have a qualified person install and ser­vice this equipment.

------------------------------------------------------------------------

MOVING PARTS can injure.

If installing the arm on a Mobiflex 200-M,

refer to the Mobiflex 200-M manual for installation
information.

If installing the arm on a Mobiflex 400-MS,

refer to the Mobiflex 400-MS manual for installation
information.

If installing the arm with an SF2400 Fan,

refer to the SF2400 Fan manual for installation
information

This manual covers installation of a:

K1655-1 LFA 3.1, 10 ft. Arm or
K1655-2 LFA 4.1, 13 ft. Arm

on a K1657-1 Wall Mounting Bracket

If installing the arm on an Extension Crane

without a K1656-1 SF2400 Fan, refer to the Extension
Crane manual for installation information.

WARNING

• Do not operate with covers open or fil­ter removed.

• Keep away from moving parts.

------------------------------------------------------------------------

Only qualified personnel should install, use or service
this equipment.

GENERAL DESCRIPTION

Lincoln’s LFA extraction arms are spring-balanced for
easy positioning. They are intended for use with a
low-vacuum, high-volume extraction fan. The LFA
arms are commonly installed on a Mobiflex 200-M
mobile base unit with filter or with an SF2400 Wall­Mounted Extraction Fan, with or without a Statiflex
200-M Wall-Mounted Filter Unit. Extension Cranes are
available in 7 ft. and 14 ft. lengths, with an optional
Feeder Hanging Rail. Lamp Kits available for both the
Mobiflex and Wall-Mounted Systems provide hood­mounted switches for the light and connected fan sys­tem. An Automatic Start/Stop Arc Sensor can be
installed with either lamp kit to automatically start the
connected extraction system (Mobiflex 200-M or
SF2400 Fan) when the sensor detects a welding arc.

Installation procedures for the K1655-1 and K1655-2,
LFA 3.1 and 4.1 Extraction Arms have been com­bined; the difference between the arms is the length of
the arm sections, which does not affect installation
procedures.

The installer is responsible for following local safety
codes and regulations.

------------------------------------------------------------------------

Before drilling, verify locations of existing gas, water,
or electrical conduits.

------------------------------------------------------------------------

K1655-1 LFA 3.1 or K1655-2 LFA 4.1 Arm Includes

• Assembled arm pieces

• Flexible hose, (2) 8” Rubber seals for hood hinge

• (2) 8” Rubber seals for base hinge

• Hood assembly

• (2) Bolts, M8x1.25, 45mm long (about 1.75”)

• (2) Nuts, M8 self-locking

• Hose running guard

• Clamping pin for red plastic ring

• Metal rotating hinge

• Red plastic ring

K1657-1 Wall Mounting Bracket Includes:

• (2) Bracket pieces

• Hanging Adapter

• Spring Bracket

• Flexible Hose, (2) 8” Rubber bands for arm base

• (2) Bolts, M8x1.25, 45mm long (about 1.75”)

• (4) Bolts, M8x1.25, 75mm long (about 3.00”)

• (6) Nuts, M8 self-locking

• (6) Washers, M8

:

LFA 3.1 & 4.1 FUME EXTRACTION ARMS

A-3

INSTALLATION

INSTALLING THE LFA 3.1 OR 4.1
ARM ON A WALL MOUNTING
BRACKET

WARNING

A-3

Only qualified personnel should install, use or service
this equipment.

------------------------------------------------------------------------

CAUTION

Leave the tape and plastic packaging on the extrac­tion arm sections until the arm is completely installed
(including mounting the hood). The arm is spring-bal­anced to compensate for the weight of the hood and
will spring out quickly if it is not mounted securely,
with the hood in place.

------------------------------------------------------------------------

MOUNTING THE WALL-MOUNTING BRACKET
Figure 1 shows suggested mounting methods for

installation on various wall types.

Fig. 1

8.3"
(210 mm)

9" (230 mm)

7.0 ft.

Fig. 2

Figure 2 shows drilling dimensions.
Standard mounting height is approximately 7 ft. from

the floor to the lower mounting holes.

Mounting on a steel I-beam using four
3/8 in. (M10) threaded rods and two
box-profile stabilizers (1x1x0.1 in.,
30x30x3 mm)

Mounting on a thin wall (recom­mended minimum wall thickness
5 in. (100 mm), using four 3/8 in.
(M10) threaded rods.

Mounting on a thick wall using
four 3/8 in. (M10) cotter bolts.

3/8"

3/8"

3/8"

3/8"

LFA 3.1 & 4.1 FUME EXTRACTION ARMS

A
B

D
E

F

C

A-4

INSTALLATION

A-4

INSTALLING THE LFA 3.1 OR 4.1
ARM ON A WALL MOUNTING
BRACKET

(continued)
MOUNTING THE LFA 3.1 OR 4.1 ARM TO THE

WALL-MOUNTING BRACKET
The rotating hinge of the arm comes in three pieces:

Metal rotating hinge, red plastic ring, and clamping
pin. Refer to Figure 3. Mount the red plastic ring to the
metal rotating hinge by fitting the clamping pin through
the hole in the rotating rod, and snapping it into place
on the U-shaped indents on the red plastic ring. The
lip of the ring should fit securely against the top edge
of the rotating flange, yet rotate with the rod. The
assembly should look like Part C in Figure 4.

2

Rotate the hinge rod (Fig. 4, Item D) so the stop pin
(Fig. 4, Item B) is in the front. Mount the hanging
adapter (Fig. 5, Item D) to the hinge rod using (2)

1.75” bolts with washers and nuts. Mount the spring
bracket (Fig. 5, Item F) into the two holes as shown.
Position one 8” rubber band (Fig. 5, Item A) and the
flexible hose supplied with the mounting bracket (Fig.
5, Item E) on the red plastic ring of the rotating hinge.

Fig. 5

1

3

Fig. 3

Position the rotating hinge on the wall mounting brack­et (See Fig. 4) so that the cable hole (Fig. 4, Item A) is
on the wall side. Use the four 3” bolts with washers
and nuts to secure the rotating hinge to the wall
mounting bracket.

C

A

B

Put another rubber band on the top of the arm. Use
(2) 1.75” bolts with nuts to mount the arm (Fig. 6, Item
B) to the hanging adapter (Fig. 6, Item A), using both
mounting holes as indicated.

AB

Fig. 6

Fig. 4

D
E

LFA 3.1 & 4.1 FUME EXTRACTION ARMS

A-5

INSTALLATION

A-5

INSTALLING THE LFA 3.1 OR 4.1
ARM ON A WALL MOUNTING
BRACKET

(continued)
MOUNTING THE LFA 3.1 OR 4.1 ARM TO THE

WALL-MOUNTING BRACKET
(continued)

Position one 8” rubber band (Fig. 7, Item B) and the
flexible hose supplied with the arm (Fig. 7, Item C) on
the hood end of the arm (Fig. 7, Item A). Put the last
rubber band on the hood connection. Mount the hood
as shown in Figure 7.

A
B
C

If using a Lincoln SF2400 Stationary Fan:

MOUNTING THE SF2400 FAN TO THE WALL
MOUNTING BRACKET

Use the (2) 0.75” bolts and the (2) 2.5” bolts with
washers supplied with the fan to mount the fan

(Fig. 9, Item B) to the rotating hinge (Fig. 9, Item C)
as shown. Tighten all mounting bolts firmly to make
the seal at the inlet of the fan.

A

B

D

Fig. 7

Snap the hose running guard into place atop the mid­dle hinge so the “nose” end faces the base of the arm
as shown in Figure 8.

Fig. 8

C

Fig. 9

A Starter/Overload switch or Lamp Kit must be
installed to provide power to the fan. Refer to the
SF2400 Stationary Fan manual for instructions on
installation of a complete wall-mounted system.

Remove the plastic and tape packaging from the arm
sections. Adjust the friction of the arm and hood
movement as described in the maintenance section of
this manual. When set, seal all hose connections with
the rubber seals.

LFA 3.1 & 4.1 FUME EXTRACTION ARMS

B-1

OPERATION

B-1

Read and understand this entire section before oper­ating your LFA 3.1 or 4.1 Extraction Arm.

SAFETY INSTRUCTIONS

Do not attempt to use this equipment until you have
thoroughly read all operating and maintenance man­uals supplied with your equipment and any related
welding machine it will be used with. They include
important safety precautions, operating and mainte­nance instructions and parts lists.

WARNING

ELECTRIC SHOCK can kill.

•Do not touch electrically live parts such
as output terminals or internal wiring.

•Insulate yourself from the work and
ground.

•Always wear dry insulating gloves.

------------------------------------------------------------------------

Only qualified personnel should operate this equip­ment.

ADDITIONAL SAFETY PRECAUTIONS

Always operate the fan with the arm installed and all
covers in place as these provide maximum protection
from moving parts and insure proper vacuum opera­tion and cooling air flow.

OPERATING INSTRUCTIONS

Turn on the connected extraction system.
For details, refer to the Operating Instructions in the
Mobiflex 200-M, Mobiflex 400-MS, or SF2400
Stationary Fan manual, as appropriate.

For optimum fume capture, position the hood within
10-15 inches (250-400 mm) of the arc. Use the rotary
valve on the base of the hood to adjust the airflow to
an apropriate level, if desired.

If using a Lamp Kit:
The switch on the hood with a lamp symbol operates
the work lamp in the hood.

WELDING SPARKS can cause fire or
explosion.

•Keep flammable material away.

•Do not weld upon containers which

have held combustibles.

------------------------------------------------------------------------

ARC RAYS can burn.

•Wear eye, ear and body protection.

------------------------------------------------------------------------

FUMES AND GASES
can be dangerous.

• Although the removal of the particu­late matter from welding smoke may
reduce the ventilation requirement,
concentrations of the clear exhausted
fumes and gases may still be haz­ardous to health. Avoid breathing
concentrations of these fumes and
gases. Use adequate ventilation
when welding. See ANSI Z49.1,
"Safety in Welding and Cutting", pub­lished by the American Welding
Society.

------------------------------------------------------------------------

If using an Auto Start/Stop Arc Sensor:
The arc sensor will automatically switch the fan on
when it senses an arc. Standard run-out time is
approximately 20 sec. The work lamp operates inde­pendently of this sensor.

LFA 3.1 & 4.1 FUME EXTRACTION ARMS

C-1

MAINTENANCE

ROUTINE MAINTENANCE

Every 3 months, check the integrity of the outside of
the extraction arm and clean it with a non-agressive
detergent.

Every 12 months:

• Check the flexible hoses and rubber seals for cracks
or damage; replace if necessary.

• Check the inside of the extraction arm and clean it
thoroughly.

• Check and lubricate the hinge points with lubricating
oil. (See Fig. 10 C)

• Check and lubricate the steel cable near the balance
wheel with lubricating grease. (See Fig. 10 B)

• Check the steel cables for wear.

• Check and adjust the friction setting of the hood,

middle, and base hinges. (See Fig. 10 A, Fig. 11)

• Check the balance construction of the extraction
arm. (See Fig. 10 A)

• Check the operation of the airflow throttle valve.

Fig. 10

C-1

B

B

Fig. 11

A

Adjust friction
with a wrench

C

C(2x) A

A AC C

C(2x)

B

C

Lubricate
with grease

B

B

360°

Lubricate
with oil

F

C

A

LFA 3.1 & 4.1 FUME EXTRACTION ARMS

D-1

TROUBLESHOOTING

Observe all Safety Guidelines detailed throughout this manual

SYMPTOM PROBLEM SOLUTION

D-1

Extraction arm creaks or squeaks.

Poor suction.

For troubleshooting Fan or Filter
problems, refer to the corresponding
manual.

Insufficient lubrication.

Leakage.
Fan outlet blocked.
Air path in arm blocked.
Filter blocked (if used).

Spark arrester blocked (if used).
Blower fan blocked.
Fan seal damaged.

Lubricate hinge points as described in
the Maintenance Section.

Check hose connections and integrity
Remove obstructions from fan outlet.
Remove obstructions from arm.
Check maintenance indicator and

replace filter if necessary.
Clean the spark arrester.
Clean excess fume or spatter from fan.
Check or replace sealing material of fan.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your

Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

LFA 3.1 & 4.1 FUME EXTRACTION ARMS

NOTES

X-TRACTOR 1GC

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WARNING

Spanish

AVISO DE

PRECAUCION

● Do not touch electrically live parts or

electrode with skin or wet clothing.

● Insulate yourself from work and

ground.

● No toque las partes o los electrodos

bajo carga con la piel o ropa moja­da.

● Aislese del trabajo y de la tierra.

● Keep flammable materials away.

● Mantenga el material combustible

fuera del área de trabajo.

● Wear eye, ear and body protection.

● Protéjase los ojos, los oídos y el

cuerpo.

French

ATTENTION

German

WARNUNG

Portuguese

ATENÇÃO

Japanese

Chinese

Korean

Arabic

● Ne laissez ni la peau ni des vête-

ments mouillés entrer en contact
avec des pièces sous tension.

● Isolez-vous du travail et de la terre.

● Berühren Sie keine stromführenden

Teile oder Elektroden mit Ihrem
Körper oder feuchter Kleidung!

● Isolieren Sie sich von den

Elektroden und dem Erdboden!

● Não toque partes elétricas e elec-

trodos com a pele ou roupa molha­da.

● Isole-se da peça e terra.

● Gardez à l’écart de tout matériel

inflammable.

● Entfernen Sie brennbarres Material!

● Mantenha inflamáveis bem guarda-

dos.

● Protégez vos yeux, vos oreilles et

votre corps.

● Tragen Sie Augen-, Ohren- und Kör-

perschutz!

● Use proteção para a vista, ouvido e

corpo.

READ AND UNDERSTAND THE MANUFACTURER’S INSTRUCTION FOR THIS EQUIPMENT AND THE CONSUMABLES TO BE
USED AND FOLLOW YOUR EMPLOYER’S SAFETY PRACTICES.

SE RECOMIENDA LEER Y ENTENDER LAS INSTRUCCIONES DEL FABRICANTE PARA EL USO DE ESTE EQUIPO Y LOS
CONSUMIBLES QUE VA A UTILIZAR, SIGA LAS MEDIDAS DE SEGURIDAD DE SU SUPERVISOR.

LISEZ ET COMPRENEZ LES INSTRUCTIONS DU FABRICANT EN CE QUI REGARDE CET EQUIPMENT ET LES PRODUITS A
ETRE EMPLOYES ET SUIVEZ LES PROCEDURES DE SECURITE DE VOTRE EMPLOYEUR.

LESEN SIE UND BEFOLGEN SIE DIE BETRIEBSANLEITUNG DER ANLAGE UND DEN ELEKTRODENEINSATZ DES HER­STELLERS. DIE UNFALLVERHÜTUNGSVORSCHRIFTEN DES ARBEITGEBERS SIND EBENFALLS ZU BEACHTEN.

● Keep your head out of fumes.

● Use ventilation or exhaust to

remove fumes from breathing zone.

● Turn power off before servicing.

● Do not operate with panel open or

guards off.

WARNING

● Los humos fuera de la zona de res-

piración.

● Mantenga la cabeza fuera de los

humos. Utilice ventilación o
aspiración para gases.

● Gardez la tête à l’écart des fumées.

● Utilisez un ventilateur ou un aspira-

teur pour ôter les fumées des zones
de travail.

● Vermeiden Sie das Einatmen von

Schweibrauch!

● Sorgen Sie für gute Be- und

Entlüftung des Arbeitsplatzes!

● Mantenha seu rosto da fumaça.

● Use ventilação e exhaustão para

remover fumo da zona respiratória.

● Desconectar el cable de ali-

mentación de poder de la máquina
antes de iniciar cualquier servicio.

● Débranchez le courant avant l’entre-

tien.

● Strom vor Wartungsarbeiten

abschalten! (Netzstrom völlig öff­nen; Maschine anhalten!)

● Não opere com as tampas removidas.

● Desligue a corrente antes de fazer

serviço.

● Não toque as partes elétricas nuas.

● No operar con panel abierto o

guardas quitadas.

● N’opérez pas avec les panneaux

ouverts ou avec les dispositifs de
protection enlevés.

● Anlage nie ohne Schutzgehäuse

oder Innenschutzverkleidung in
Betrieb setzen!

● Mantenha-se afastado das partes

moventes.

● Não opere com os paineis abertos

ou guardas removidas.

Spanish

AVISO DE

PRECAUCION

French

ATTENTION

German

WARNUNG

Portuguese

ATENÇÃO

Japanese

Chinese

Korean

Arabic

LEIA E COMPREENDA AS INSTRUÇÕES DO FABRICANTE PARA ESTE EQUIPAMENTO E AS PARTES DE USO, E SIGA AS
PRÁTICAS DE SEGURANÇA DO EMPREGADOR.

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